Heating Degree-days

 

A heating degree-day is basically a measure of how cold it has been.

 

When heating a space, fuel demand varies according to how cold it is.  Degree-day units were developed to help in estimating the heat requirements and fuel costs for a building.

 

When the outside air is above a certain temperature no heat is required.  This is what we refer to as a base temperature.  65º F is used as the base temperature for calculating heating degree-days.

 

If you take the average daily temperature and subtract it from 65º F you can determine your degree-days.  Each degree accounts for one degree-day.

 

If today’s High temperature is 50º F and the Low is 30º F our average daily temperature is 40º F. Subtract 40º F from 65º F and you will see that there are 25 degree-days for today.

 

Heating costs are directly proportional to the number of degree-days in a year.

 

 

 

Heating Degree Days
DD	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	Total
1996	883	733	597	254	27	2	0	0	36	151	542	647	3,872
1997	815	501	294	271	102	8	0	0	2	213	580	791	3,577
1998	621	557	494	201	20	6	0	0	2	104	359	639	3,003
1999	645	516	563	116	9	0	0	0	34	153	343	619	2,998
2000	780	480	303	239	10	4	0	0	36	121	515	1041	3,529
2001	867	514	563	116	9	2	0	0	62	213	278	571	3,195
2002	700	708	467	156	113	1	0	0	1	143	539	729	3,557
2003	982	715	424	191	48	11	0	0	51	216	389	830	3,857
2004	883	738	406	247	53	2	0	19	27	105	393	817	3,690
2005	685	595	541	234	115	0	0	0	8	233	406	839	3,656
2006	553	667	442	90	63	0	0	0	49	274	475	597	3,210
2007	691	719	265	279	32	0	0	0	7	137	473	542	3,145
2008	791	583	413	223	65	0	0	0	2	239	587	725	3,625
2009	848	606	398	242	43	4	0	0	13	290	500	840	3,784
2010	1,056	911	601	172	42	0	0						2,782
2011
2012
2013
2014
2015
2016
Usage in MCF (Thousand Cubic Feet)
MCF	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	Total
1996	396,208	347,479	311,707	210,115	132,700	107,532	110,116	99,736	112,343	160,121	290,606	322,951	2,601,614
1997	382,058	296,177	217,816	205,651	135,413	112,437	90,952	97,729	104,819	179,400	299,786	396,331	2,518,569
1998	355,856	325,742	308,584	178,376	116,767	102,114	85,728	93,641	81,295	119,486	211,904	316,395	2,295,888
1999	354,272	289,479	332,520	146,399	107,971	99,341	86,931	92,244	95,297	152,547	213,219	340,858	2,311,078
2000	393,830	301,382	235,984	196,914	106,328	99,732	84,637	94,533	106,181	153,870	285,609	459,027	2,518,027
2001	447,937	310,362	329,372	159,110	121,809	97,701	101,791	89,263	111,721	179,515	203,515	311,868	2,463,964
2002	400,958	377,064	298,593	165,558	120,249	99,687	88,683	91,446	92,811	139,783	300,719	399,748	2,575,299
2003	495,624	407,793	274,728	174,472	112,707	103,413	98,672	100,233	109,571	151,979	219,360	428,221	2,676,773
2004	467,503	411,145	256,243	186,041	120,396	122,495	98,417	112,253	100,175	120,535	226,666	417,573	2,639,442
2005	395,355	344,805	330,408	167,032	133,361	106,928	95,890	103,768	100,693	167,280	257,821	439,690	2,643,031
2006	349,180	379,831	280,920	148,884	126,155	103,425	106,542	102,583	103,663	188,588	289,904	356,140	2,535,815
2007	429,627	420,115	226,814	212,025	112,733	96,233	114,796	110,344	103,949	136,216	278,687	320,006	2,561,545
2008	459,068	359,822	292,502	182,738	130,659	110,881	102,081	113,819	115,521	174,036	308,740	383,571	2,733,438
2009	449,829	337,133	271,933	172,481	105,236	106,634	98,303	100,958	111,215	166,159	246,984	422,711	2,589,566
2010	528,353	468,197	354,179	173,382	124,289	111,878	110,130						1,870,408
2011
2012
2013
2014
2015
2016